JSON formatting and serialize serialization, jsonserialize_php tutorial

JSON format and serialize serialization, jsonserialize

First, JSON format

1. What is JSON

JSON is a data storage format used to communicate client-side JavaScript and server PHP interactions. We pass the JSON-generated string to the foreground javascript,javascirpt, which we can easily reverse-json and then apply.

2. How to use JSON

PHP operation JSON can use Json_encode () and Json_decode () two functions--one encoding, one decoding. Json_encode () can convert arrays into JSON-formatted text data for easy storage and reading, while Json_decode () can directly convert JSON data into arrays for easy invocation.

!--? php   $arr  = Span class= "Hljs-keyword" >array  ( ' name '  = ' Liu Lu ' /span>,  ' Nick '  = ' Little Lulu ' ,  ' age '  =" , " ' contact '  =array  ( ' phone '  = ' 1 3718136109 ' ,  ' address '  = ' Beijing Ifdoo '         )    );     $str  = Json_encode ( $arr ); echo   "GetProfile ($STR)" ; ?>   

The result is:
{"Name": "\u5218\u7490", "Nick": "\u7490\u5c0f\u7490", "Age": "+", "contact": {"Phone": "13718136109", "address": "\ U5317\u4eac \u5f97\u8c46 "}}

3. JSON-formatted data and web front-end JS complete asynchronous interaction process

After PHP uses Json_encode () to convert an array to JSON-formatted data, this JSON string is equivalent to an array in JavaScript, which is assigned to a variable and can be manipulated by the array.

4. Example

Index.html

 <html><head><title>JSON demo  
     title
  >        <script type="Text/javascript">  function getprofile(str) { var arr = str;    document. getElementById (' Nick '). InnerHTML = Arr.nick; }         
     Script
 > 
     Head
 ><body>    <div id="Nick"> 
     Div
 > 
     Body
 ><script type="text/javascript" src="./profile.php" > 
     Script
 > 
     HTML
 >

profile.php

!--? php   $arr  = array  ( = ,  ' nick '  = ,  ' age '  =  ' 26 ' /span>,  ' contact '  = array  ( ' phone '  =  ' 13718136109 ' ,  =  ' Beijing Ifdoo ' );  $str  = Json_encode ( $arr ); echo   "GetProfile ($STR)" ; ?>  

• HTML page called PHP file

  The echo output in a.php is the JavaScript code.

• PHP page Call js file

  A.php in the Echo JS method can be.

II. serialization of Serialize

1. What is serialize?

Serialize is a string expression that serializes a variable and returns a variable type and structure.

2. How to use Serialize

Use PHP's serialize and unserialize to serialize and deserialize arrays.

         $arr=Array("U1"=Array("Gamename"="de-B","Homename"="Bielefeld","Guestname"="Braunschweig","EndTime"="2015-08-21"),"U2"=Array("Gamename"="Premier League","Homename"="Crystal Palace","Guestname"="Aston Villa","EndTime"="2015-08-22")     );EchoSerialize$arr);?>

The result is:

A:2:{s:2: "U1"; A:4:{s:8: "Gamename"; s:6: "de-B"; S:8: "Homename"; s:15: "Bielefeld"; S:9: "Guestname"; s:12: "Braunschweig"; s:7: " EndTime "; s:10:" 2015-08-21 ";} S:2: "U2"; A:4:{s:8: "Gamename"; s:6: "Premier League"; S:8: "Homename"; S:9: "Crystal Palace"; S:9: "Guestname"; s:15: "Aston Villa"; s:7: "EndTime"; s:10 : "2015-08-22";}}

which

A:2 indicates that this is an array with two elements;
I:0 refers to the sequential index;
A:4 means there are 4 fields;
S:8: "Gamename" indicates that this is a string with 8 characters (string)

Summary: PHP's serialize is easy to store after serializing arrays, while JSON-formatted data is not only easy to store but also readable with other languages such as JavaScript. It is recommended to use JSON if the front-end interaction is used more, with PHP, Javascript, JSON, and Ajax to accomplish powerful data interactivity.

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